HI, the center stone of this ring is a natural, earth mined, Australian opal, 7x5 mm, oval cabochon, 0.60 carats, color play. The ring has 6 natural diamonds, SI1 clarity, color g-h, 0.06 cttw. The ring is made in 14kt solid gold. I have 3 of this rings, one in white gold, one in rose gold, and the one in the pictures in yellow gold. The size of the ring is 7.75. I offer change the size of the ring to any size from 3 to 13 with no extra charge, so if you buy one of this rings all you need to do is send me a message telling me the color of the gold and the size that you need. The weight of the ring is 4 grams; 20 mm wide. LOVE IT OR RETURN IT.